package com.example.blog.common.advice;

import com.example.blog.common.pojo.Result;
import com.fasterxml.jackson.databind.ObjectMapper;
import lombok.SneakyThrows;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.MethodParameter;
import org.springframework.http.MediaType;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: Li_yizYa
 * Date: 2025/7/25
 * Time: 17:45
 */
@ControllerAdvice
public class ResponseAdvice implements ResponseBodyAdvice {

    @Autowired
    private ObjectMapper objectMapper;

    @Override
    public boolean supports(MethodParameter returnType, Class converterType) {
        return true;
    }

    @SneakyThrows
    @Override
    public Object beforeBodyWrite(Object body, MethodParameter returnType, MediaType selectedContentType, Class selectedConverterType, ServerHttpRequest request, ServerHttpResponse response) {
        // String
        // Result
        if (body instanceof Result<?>) {
            return body;
        }
        // 对 String 类型特殊处理，通常情况下不返回 String 类型，
        if (body instanceof String) {
            return objectMapper.writeValueAsString(Result.ok(body));
        }
        return Result.ok(body);
    }
}
